Q12) What do the Bold numbers stand for?

4 61 unit_models/_Units/EN_Peasant_Padded/ne_cannon_crew_lod0.mesh 121 61 unit_models/_Units/EN_Peasant_Padded/ne_cannon_crew_lod1.mesh 900 61 unit_models/_Units/EN_Peasant_Padded/ne_cannon_crew_lod2.mesh 2500 61 unit_models

A12) As far as I understand it the 4 means there are 4 level of detail meshes to load for the unit and the larger numbers are the distance that each lod should be used.